If you leave your line on the reel in your hot vehicle it will retain the shape of the reel when you strip it off. This may not cause any problems if it's warm outside because it will eventually relax. But it'll tangle easier when the air is cool.
As for your rod, I doubt you'll notice any degradation in the structural integrity of the fibers until you've got a trophy on. (At least that would be my luck...)
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There's almost nothin' wrong with the first lie, it's the weight of all the others holdin' it up that gets ya'! - Tim
Jesus still hangs out with fishermen.